Single Irreversible Pseudo -First-Order Reactions

b Single Irreversible (Pseudo) First-Order Reaction 

The equation governing difiusion, reaction and accumulation of /4 in a unit volume element of the liquid may be written  

The first condition expresses that, from a certain time onward, a gas, in which the component A has a partial pressure, is brought into contact with the liquid, so that a concentration C, - is obtained at the interface. The initial concentration of A in the liquid is considered to be zero. Since the exposure time of the element at the surface is rather brief and since its capacity is not considered to be zero the concentration front of A is not likely to extend to the inner edge of the element. This is expressed by the BC for t 0 = 0 at y = ao. In the case of a pseudo- 

The equation is conveniently integrated by means of Laplace transforms. Transforming with respect to time leads to 

The boundary condition = 0 for y = oo requires /I, to be zero. is determined from the boundary condition at y = 0  

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